First of all, thank you for your share ThopHayt!
Now I would like to tell you about my experience of negative SEO that has completely affected my website. I have never done negative SEO to anyone but I was/am (don't know yet) the target of a guy that managed to spam the shit out of my website which was #10 on a 1milion search/month keyword with lots and lots of polish/russian/chinese links (probably xrumer/gsa spam crap). In less than 2 weeks my site went from #10 to the big abyss of Google search (nowhere to be found). I have been scanning the website closely using Cognitive SEO, Ahrefs and Majestic for my backlinks and kept my disavow list up to date. Even that I have OVER 5000 domains in my disavow list I find that Google webmasters still have links that none of those backlink crawlers find (ahrefs,cognitive,majestic) which I do not know until today. After weeks of updating my disavow the website is now back bouncing at #45-60 (but at the same time having keywords at #20 which makes me think its still not penalized). Now, I am not sure what negative SEO I have received but the guy is completely mad (I even have/had (don't know if disavowing them deletes them) IP redirects from russia+china to my website).
What are your thoughts guys, on my experience?